Process of roasting ores, intermediate products, and other metalliferous materials.



UNITED STATES PATENT OFFICE.

ROMAN v. ZELEWSKI, OF ENGIS, VILLA IDEI'IEIN, BELGIUM.

PROCESS OF ROASTING ORES, INTERMEDIATE PRODUG'IS, AND OTHER METALLIFEROUS Patented May 19, 1914.

Serial No. 749,233.

To all whom it may concern Be it known that I, ROMAN v. ZELEWSKI, director, a subject of the King of Prussia, residing at Engis, Villa dEhein, in the Kingdom of Belgium, have invented certain new and useful Improvements in Processes of Roasting Ores, Intermediate Products, and other lifietalliterous Materials; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in tac art to which it appertains to make and use the same.

This invention relates to an improved process for roasting ores.

According to my improved process, 1 propose to refine briquets containing sulturous ores and intermediate products, the briquets simply being roasted.

In carrying out my improved process, briquets containing sulfid ores are piled in checker-beard form in an inclosure, and then hot products oi combustion to pro-heat and ignite the gases liberated from the briquets are supplied. To augment the combustion, air under pressure is introduced to the inclosure, which by reason of the porous character of the briquets, and the fact that the latter are spaced apart, the heat is forced through and around said briquets. After the briquets are heated sufficiently to liberate the gases and the latter become ignited, the heated products of combustion are discontinued, although the supply of air is continued to assist in liberating the gases and promote the combustion. This operation continued until the combustible gases are consumed and the briquets reach a slag condition, whereupon the supply of air is cut oii.

My invention is particularly well adapted Application filed February 18, 1913.

for the treatment of briquets, the constituent parts of which are formed of ores known as blends. These ores contain gaseous fuel which must be eliminated without absorb ing the metal, vapors or oxids. I have found that when the ore is made into briquet form and first subjected to pro-heating combustion, with the assistance oi air under pressure to liberate the gases, the briquets will roast, and the salient oxids will be pre served.

The briquets are porous, hence when the pro-heating combustion is applied, the air forces the combustion through the pores and drives the combustible gases out, and they become ignited and eventually, with the assistance of the air, complete the roasting process.

Having thus what I claim is:

The herein described process of treating briquets containing sultid ores, consisting in inclosing spaced apart briquets supplying hot products of combustion to preheat and ignite the gases liberated from the heated briquets, discontinuing the supply of heated products of combustion after ignition of the gases has commenced, contii'i'uing the supply of air under pressure, causing the same to permeate the pores in the briquets and pass around the latter, and augment the combustion until the combustible gases are consumed and the briquets reach a slag condition, then cutting oi]? the supply of air.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ROMAN v. ZELEVSKI.

described my invention,

lVit-nesses A. P. Canons, L. Pnrrmnn'rrnu.

copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

